There are 10 US Post Offices in Nash County serving a total of 109,057 residents equating to 10,906 residents per post office. It's estimated that approximately 174,067 packages are handled across the 10 county post offices annually. Nash County is a county located in the U.S. state of North Carolina. As of the 2010 census, the population was 95,840. Its county seat is Nashville. Nash County is now a part of the Rocky Mount, NC Metropolitan Statistical Area, instead of the Raleigh, NC Metropolitan Statistical Area.